Two volumes of air are separated by a thin rectangular heater (0.2 cm x 15 cm x 2 cm). The volumetric heat generation associated with the heater is 350 kW/m3. What is the temperature of the heater at steady state? The air in the bottom chamber is at (TB = 20 °C, hB = 15 W/m2.K) while the air in the top chamber is at (TT =55 °C, hT = 9 W/m2K). hint: for such thin application, we shall assume the same surface temperature on both sides of the heater.

Q: 42 oC with convection heat transfer coefficient of 9.0 W/m2 K. Solar radiation incident on the…

A: given:T0=45CT∞=42C h=9w/m2kthickness l=25cm

Q: Two volumes of air are separated by a thin rectangular heater (0.2 cm x 15 cm x 2 cm). The…

A:

Q: The inner and outer surfaces of a 25-cm-thick wall are at 27 oC and 45 oC, respectively. The outer…

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Q: As shown in the figure, an exterior wall of a building has an average thermal conductivity of 0.32…

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Q: The thermal contact conductance hc at the interface is 11,000 W/m2·°C. Determine the thickness of…

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Q: Why do the heat engine manufacturers seek for new materials, coatings that can withstand even higher…

A: 2nd. Law of the thermodynamics is qualitative law. means it says, about how much amount of heat  (…

Q: A Carnot engine requires 35 kJ/s from the hot source. The engine produces 15 kW of power and the…

A:

Q: A solar collector meets the hot water needs of a family for 7 months, excluding 5 months of the…

A: Period of time in which hot water is needed = 7 months Average temperature of hot water = 55°C…

Q: As shown in the figure, an exterior wall of a building has an average thermal conductivity of 0.32…

A: Givenk=0.32Btu/h ft  oRL=5inT1=70oFT2=?To=20oFh=5.1Btu/h ft2 Ro

Q: costs Tom and Jerry are each trying to sell you a heat engine. Both engines work between high and…

A:

Q: (ii) Consider the process of baking potatoes in a conventional oven. Can the hot air in the oven be…

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Q: A house is to be maintained at 20°C when the outside air is at -25°C. It is determined that 1800 kJ…

A:

Q: As shown in the figure, an exterior wall of a building has an average thermal conductivity of 0.32…

A: Given:Thermal conductivity of the wall, k=0.32 Btu/h.ft.°RThickness of wall, L=8…

Q: A 100W CPU with a size of 10x 10 cm is cooled at steady state with 25°C water that is pumped through…

A:

Q: Energy transfer in mechanical systems During steady-state operation, a mechanical gearbox receives…

A: Step 1: Step 2: Step 3: Step 4:

Q: A heat pump uses 100 J of energy as it operates for a given time. Isit possible for the heat pump to…

A: Heat pump is thermodynamic device which fetches or extracts heat energy from a  thermal heat…

Q: Thermodynamicclass  contains  32  undergrad  students.  The  plan  is  to   air-conditionthe…

A: Given data: Total number of students = 32 Cooling capacity of air-conditioning unit = 8 kW Heat…

Q: A room is heated by an electrical space heater operating at 1500W and its temperature is 800 C. The…

A: Given: space heater Q˙ = 1500 W Temperature(Th)  = 800°C Convective heat transfer coefficient (h)= 6…

Q: Two volumes of air are separated by a thin rectangular heater (0.2 cm x 15 cm x 2 cm). The…

A:

Q: PR and As shown In the figure, an exterior wall of a bullding nas an average thermal conductivity of…

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Q: Consider a pipe with an inner radius of 15 cm, an outer radius of 20 cm, and k = 15 W / m ∙ oC. The…

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Q: The food compartment of a refr °C by removing heat from it at refrigerator is 2 kW. Determine and…

A: Given: Win = 2 kW QL = 360 kJ/min

Q: A classroom that normally contains 40 people is tobe air-conditioned with window air-conditioning…

A:

Q: b. A slab of stone of area (3600 + R) cm² and thickness 10 cm is exposed on the lower surface to…

A: Draw diagram of slab for better understanding

Q: As shown in the figure, an exterior wall of a building has an average thermal conductivity of 0.32…

A: Given:Thermal conductivity of wall, k=0.32 Btu/h.ft.°RThickness, L=5 inT1=70°FTo=30°FConvective heat…

Q: SANAE IV, a research station of The South African National Antarctic Programme (SANAP), is located…

A: Given: The temperature of science lab, T2 = 307.8 K The heat supplied to lab, Q2 = 17360 J The work…

Q: A room is initially at the same temperature as the air outdoors, 10°C. A heater whichconsumes 1kW of…

A: The objective of the question is to calculate the equilibrium temperature reached in the room when a…

Q: The refrigerator shown in the figure steadily receives a power input of 0.15 kW while rejecting…

A: Given data

Q: Compare an SHS with a solid storage material and an LHS with a PCM storage material. The thermal…

A: Given, Thermal capacity of energy storage system:-Q=600KWhQ=600×3600Q=2160000KJFor SHS,Density of…

Q: The eyclic device can be

A: Given data; T1=1000 KT2=500 KT3=300 KQ1=Q2=Q3=100 KJ=50 KJ=60 KJ respectiveley

Q: the irreversibility (in W) due to heat transfer through the

A: Given. One side of a wall is maintained at,T1=400 KT2=300 KHeat transfer rate,Q=…

Q: A. A fluid at 100 psia, with a specific volume of 4ft³/lb and a velocity of 600 ft/s, enters a…

A: GivenP1=100psi=689.476kPav1=4 ft3/lb=0.062428 m3/kgV1=600 ft/s=182.88 m/sP2=20psi=137.895 kPav2=15…

Q: In a room (6*5*4 m), if you have a thermal mass in a concrete floor with a thickness of 15 cm…

A: Given, Specification of the room, V = 6*5*4 = 120 m3. Thickness of concrete, t = cm Density of…

Q: One side of a wall is maintained at 400 K and the other at 300 K. The rate of heat transfer through…

A: Given Ts1=400 KTs2=300 KQ.=1000 WTsur=25oC To find Rate of heat transfer within wall

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.